whole in the front is meant for power button ( https://www.gme.cz/tlacitkovy-spinac-pbs-10b-2-r )
+ second version of front panel with mount of usb and audio ports (https://www.lapert.cz/ostatni/nahradni-predni-panel-pro-pc-usb-2-0-usb-3-0-audio-jack/)
The author marked this model as their own original creation.